Lens-fitted photo film unit with flash device and protective cov

Details Lens-fitted photo film unit with flash device and protective cov Lens-fitted photo film unit with flash device and protective cov

1999-06-07

2000-11-21

Lee, Eddie C.

Photography

With object illumination for exposure

With power supply detail

396448, 396543, G03B 726, G03B 1700

Patent

active

061514551

ABSTRACT:
A protective cover has an arm extending toward a flash switch operation member, and a cam follower pin is formed on a free end of the arm. A flash switch knob, a shifting cam groove and a locking cam groove are formed integrally on a switch plate. When the protective cover is opened, the cam follower pin slides along the shifting cam groove, causing the flash switch knob to move to an ON position, turning on a flash switch of a flash device. In the open position of the protective cover, the cam follower pin is disengaged from the shifting cam groove, allowing the flash switch knob to move to an OFF position. When the protective cover is closed while the flash operation member is in the ON position, the cam follower pin slides along the shifting cam groove into a locking cam groove, causing the flash switch knob to move to the OFF position. While the cam follower pin is in the locking cam groove, the flash switch knob is locked in the OFF position. When the protective cover is closed while the flash operation member is in the OFF position, the cam follower pin slides along a guide cam surface formed above the shifting cam groove, and is guided into the locking cam groove.

REFERENCES:
patent: 4264172 (1981-04-01), Miyagawa et al.
patent: 4319818 (1982-03-01), Sawara
patent: 5608478 (1997-03-01), Kamoda
patent: 5765068 (1998-06-01), Kamoda
patent: 5895136 (1999-04-01), Grant et al.
patent: 5943521 (1999-08-01), Lamphorn et al.

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